Screw driver



; Oct. 21, 1930. B. N. SOKQLOFF 1,779,339

SCREW DRIVER Filed July 9, 1929 gnwmbot: 1

Patented Oct. 21, i930 l r 1,779,339

, UNITE'D )S'TATE'S PATENT OFFICE i v I Bonis 1v. so KoIlo'FFQor wls mewbmmsmem ooLUivtBIA. I

SCREW mvm h r r Application fi led July 9, 1929; Serial 1Y0. 376,91 8;

This invention relates to a screw driver 3 shall provide a-relatively long bearing 6 and particularly toa screw driver of the type r-the me of the s r w driverincluding a chuck for holding and guiding i As lllustrated, the stem 4: is provided with the screw. i v V a y yea-handle? ofconventional form for manual '5 An object of theinventionis to provide a QP Ij i HaHd a head 8 having a bit for en- 55 simple and inexpensive screw driver assemg g ng e r Of a eWybllh 1t w1l l be apbly'which will hold the screw in longitudinal "pat that? the stem-4 may, if desired, be :alinement with the driver andat a prede- -f by e r cs p er-ether eOIlVeIly te rmi'ned angle to the work wl t f f P J O vi usly, t e Stem f A furtherobject is to provide, a device of V yrb Qpe t by @M O r h t- 0 the type stated ineludingqa guide for-resting The e k 9 l l g h fs rew 1s slldably against-the work, the, guide being so con- ,lm t d- 1t l he m COIIIPIISQS :struoted that it will not seratehorldeface the r e fi avmg a 3 Op i g 9 through .faee vof the ,work.' kw lch he re -dnv r s ml p s Th These and other obj eetsofitheinvention h edl i 1 f ubst a exiallength d will be apparent fromethe-following specifi- "g ld df r:r l n veme y cation when I taken]; with the accompanying zen gem t w h b the b 1 and the d i i hi h; r p V v I Q stein l. Opposite SldGS of the head 9 may be I Figure '1 is a fragmentary side view of one away to pr v e fia ur a t 'Wh the 20 (embodiment of theinvention, the guide and l PP 'e of p g blades 10 ere/Secured y the work;

screw chuckv being shown 'in longitudinal s ews- Q f heli fl h qwe por of section; {1- vi' he bl estb n ve e -e r p Fig. 2 is aside elevation, partly inse'ction, t9 0 3 e u le Cheek Whiehterminefieein showing the screw when'driven part way, into I roun e e'U uR e ype of A. p 7 p ieohuolrsemay beused instead of the speolfie Fig. 3 is a sideelevation vof thezchuek for m l e F ex p s d' of holding the Screw, and A 1 er nployl tig sections of sprlng metal, the clutch Figs. 4, and .5 are a top and bottom view,swm l maybenreletlvelyerlgldand the vrespectivelyiofthe chuck v 1 a V spningaotion obtalned by externalor internal ,30 Inthe drawings, thenumer'al 1 indicates ie l eni m e s t g Il' he'l e 7 the elongated tubular member j-which: is itw s t 11 1 1 the lowerendsof the same in l t l t estla 'n t theworkandi roe With the e 5;; i, :id? 5 ,1131: 'fori Screw. The tubej l is bTObmselt a SCFeW 14 the blue? ehuek preferably formedof relatively thin metal eh e L 15 e it adlaeent the 35 "Stock and a a of ,sluitablg. shape 350 i open endof the tubular guide, the screw is infrom the tube 1, the-member 3 may beseourecl 1 v e ei lr eeeewee h i eat manner? crease the: area of Qeontaot with the work is sewed FQm he ppe f endqf e e and is providedrat the lower end 2 of the tuber. As forced mm h PosltlQn o In l shown; arounded bearing surface isfor mecl $filiffi2 g gigid 0 r v li ghf f stantiallylth e; samei nannerias the convene0 Closer-use a guideilin "which tilestem 45 of'the -s erew drive? asses and 013emt1ng'the'$-creW drlveir m v a ,p i 1 o ,dle 7; with the otherhand. The toolls first -fi as Shown -l 'j l lsepam 8 held so vthat the end of the screw projects heyondthe end 2 oithe guide in order that the I pointof the screw maybe properly/positioned 4 L I a on the work. The guide tubel is then pressed l 31PM? q 'gjo i 's ur g downwa'rdlyinto firm contact with the work, 7 '11s not ,ImpQl'l' tj,'t he' and the screw driver is rotated in the usual to the tube'byrivets hr the f I ra fiie e lm lm empley t g: the m efrej. the {same to the' gui threaded fastenings.

- end bearing surface of the guide tubemay lie screw into the flared upper end of the clutch and spreads the members 12 to release the SCI'QV.

While I have described the invent-ion in connection with wood screws, it will be apparent that the screw driver may be employed for driving machine screws or other screw- For special work, the

in a plane which is not normal to the'axis of r the screw driver, or it may be given any special shape which maybe required to provide a firm bearing between the guide tube 'and'a workpiece of irregular shape.

It will be noted that the guide and chuck are fixed to the screw driver by the enlarged driving head 8. While thisarrangement is to be preferred since it prevents accidental separation or loss of the parts, the head 8 may beso shaped as to permit removal of the screw driver.

For convenience of description, reference has been made to the relative position of the parts as they appear in Figs. 1 and 2 of the drawings, but it is apparent that there is nothing in the construction or' methodof operation of the screw driver which prevents the driving of screws into surfaces which are vertical or inclined. I

It will be apparent that various changes may be made in theseveral component parts ofthe device, and the relative size, shape and arrangement without departure from the spirit of my invention as setforth in the following claims.

Iclaimu l V 1. A screw driver comprising a screw driver stem terminating in a bit for engaginga screw, a tubular guide having one end thereof shaped for engagement with the face of the work, means at the opposite end of said guide providing a bearing in which said stem is supported for longitudinal and-for rotary -movement, and a chuck for holding a screw,

said chuck comprising a head slidable with-- in and guided for rectillnear movement by saidtubular guide, said head having an aperture providing a bearing for said stem,

and yieldable clutch members carried by said head and engaging the screw,

'2. A screw driver comprising a screw driver stem terminating in a'bit for engagmg a screw, a tubular guide havmg-oneend thereof shaped for engagement with the face of the work, means at the opposite end of said guide providing an elongated bearing in which said stem is supported for longitudinal and for rotary movement, and a chuck for holding a screw, said chuck comprising a head slidable within and guided for rectilinear movement by said tubular guide, said head having a central aperture providing a bearing for said stem, and spring blades secured to said head and curved at their free ends to form a tubular chuck for receiving a screw.

8. A screw driver comprising a screw driver stem terminating in a bit for engaging a screw, a tubular guide having one end thereof shaped for engagement with the face of the work,means at the opposite end of said guide providing a bearing in which said stem is supported for longitudinal and for rotary movement, and a chuck for holding a screw, said chuck comprising a head slidable within and guided for rectilinear movement by said tubular guide, said head having an aperture providing a bearing for said: stem, andyieldable clutch members carried by said head and engaging the screw, said clutch members terminating in smooth rounded surfaces capable of sliding on the face of the work. L

4. A screw driver comprising a screw driver stem terminating in a bit for engaging a screw, a tubular guide having one end thereof shaped for engagement with the face of the work, means at the opposite end of said guide providing a bearing in which said stem is supported for longitudinal and for rotary movement, and a chuck for holding a screw, said chuck comprising a head slidable within and guided for rectilinear movement by said tubular guide, said head having an aperture providing a bearing for said stem, and yieldable clutch members carried by sald head and engaging the screw;

said tubular guide comprising a relatively thin-walled metal tube terminating at one end in a smooth rounded surface for contact with the face of the work.

5. A screw driver comprising a screw driver stem terminating in a bit for engaging a screw, a tubular guide having one end thereof shaped for engagement with the face of the work, means at the opposite end of said guide providingv a bearing in which said stem is supported for longitudinal and for rotary movement, and a chuck for holding a screw, said chuck comprising a head slidable within and guided for rectilinear movement by said tubular guide, said head having an apertureproviding a bearing for said stem, and yieldable clutchmembers carried by, said head and engaging the screw; said tubular guide comprising a thin-walled metal'tube', the metal at one end thereof being rolled back to form a'smooth bearing surface for engagement with thework; and said clutch members terminating in smooth rounded surfaces capable of sliding on the face of the work. I

6. An attachment for use with a power screw driver having a driving stem, a tubular guide having one end thereof shaped for engagement with the face of the work,

means at the opposite end of said guide prom viding a bearing in which said stem is supported for longitudinal and for rotary movement, and a chuck for holding a screw, said chuck comprising a head slidable within and guided for rectilinear movement by said tubular guide, said head having an aperture providing a bearing for said stem, and yield able clutch members carried by said head and engaging the screw.

In testimony whereof I afix my signature.

BORIS N. sononorr. 

